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    <title>Document</title>
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<body>
<script>
   /*  let promise = new Promise(function executor(resolve,reject){
        let number = Math.random();
        if(number>0.5){
            resolve(number);
        }else{
            reject('太小了');
        }
    });
    console.dir(promise) */
    console.log(1);
    let promise = new Promise(function executor(resolve,reject){
        console.log(2);
        resolve('value');
    });
    console.log(3);
    promise.then(
    function onFulfilled(value){
        console.log(4);
        console.log(value);
        console.log(this)
    },
    function onRejected(reason){
        console.error(reason);
        console.log(this)
    }
    );
    console.log(5);
</script>
</body>
</html>